Usually it's wise to placate the people you screw. One of my favourite sayings is, "Friends come and go, enemies accumulate." You don't want too many, especially those who have little to lose.

Building good will after the fact is very wise, even if it only buys a grudging acceptance. The prestige is also a major bonus in smoothing over business dealings.

Getting a bad rep leads to cautious or worse terms in deals, if not being outright bypassed in favour of a competitor.